EFFECTIVE BLEACHING: Kiisiiso Toilet Bowl Cleaners contains powerful cleaning ingredients that effectively removes stubborn stains such as urine stains, limescale and rust with every flush. If you can smell the cleaner every time you flush, don't worry, that's the powerful cleaning ingredients at work. Keep your toilet fresh | LONG LASTING: With sustained release technology, each toilet bowl cleaner tablets will continue to freshen your toilet bowl for at least 15 days, during which time it forms a protective film that prevents stubborn stains from sticking. It saves you a lot of time and energy by eliminating the need for frequent manual scrubbing of the toilet bowl. One box can be used for up to half a year, keeping your toilet bowl clean and sanitized at all times | Easy to Use, No Scrubbing Required! Simply unpack, place the toilet tank cleaner tablets in the tank, let it dissolve for 30 minutes and then flush. The simple operation saves you a lot of time and effort | NEUTRAL INGREDIENTS: Kiisiiso toilet bowl tablets are made entirely of dye-free, neutral ingredients, and each packet is carefully packaged to ensure that it will not come into direct contact with your skin or damage any metal or plastic parts of your septic system (These tablets are slow-release tablets, designed to dissolve gradually over 1-2 weeks, not mel away immediately.) | IMPORTANT: Kiisiiso toilet cleaner tablets reduces the build-up of dirt in the toilet bowl, but is not a substitute for a toilet brush. Therefore, please deep clean the toilet bowl with a brush before first use in order to fully utilize the effectiveness of the product. When the Toilet Bowl Cleaner tablets are completely dissolved, please replace with new Toilet Bowl Cleaner tablets(Please store away from children and pets)